mgrib(grib_field_position = 1, grib_input_file_name = "700_hPa_divergence.grib") mcont(contour_level_selection_type = "level_list", contour_shade_colour_method = "list", contour_shade_method = "area_fill", contour_shade = "on", contour_level_list = [-200.00, -100.00,...,100.00, 200.00], contour_hilo = "off", contour = "off", contour_highlight = "off", contour_label = "off", legend = "on", contour_shade_colour_list = ["rgb(0,0,0.3)", "rgb(0,0,0.5)",...,"rgb(0.5,0,0)", "rgb(0.3,0,0)"])